January 2017
Intermediate to advanced
314 pages
6h 42m
English
Content preview from .NET Design PatternsBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Solutions approach
We will divide the requirement into the two following parts:
- A library for evaluating arbitrary mathematical expressions
- An application which will consume the aforementioned library to plot data
The expression evaluator library requirements can be enumerated as follows:
- Modeling expressions as AST
- Writing a lexical analyzer
- Writing a recursive descent parser
- Depth first walk of the tree
- Supporting trigonometric functions and pseudo variable (
$) - Packaging everything as a facade pattern-based API
The application requirements can be enumerated as follows:
- A screen with a WPF 2D graphics surface
- A prompt for entering expressions
- Implementation of the observer for detecting a new plot request
- Passing the value to the expressions library for change ...
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.